Suction cleaner



March 23 1926. 1,577,696

H. s. DEMAREE SUCTION CLEANER Filed Feb: 1, 1923 lnve n+or- Harr 5. Demar-ee AH-orne patented Mar. 23, 1926.

UNITED STATES P rENroFFice.

HARRY s. DEMAREE, or c -rIcAeo, ILLrn'ors, ASSIGNOR To run noov'nn COMPANY, A

' GO'RPORATION or 'onro.

. SUCTION Application filed February '1'0- oil whomit may con-oer Be it known that l, l IARRY S. DEMAREE, a citizen of the United States, and a resident of Chicago in the county of Cook and State of Illinois, have invented a new and useful linprovementin Suction Cleaners, of which the following is a full, clear, and exact description.

My invention relates in general tosuction cleaners and in particular to that type of cleaner illustrated and disclosedin Letters Patent No. 1,311 ,307 granted to Francis M. Case, and reissued as No. 14,883, October 23,1917.

In suction cleaners of this type the suction nozzle is situated at a substantial distance above the floor and the floor covering is raised to the nozzle and held thereagainst by atiinospheric pressure, the pressure within the nozzle being reduced by any suitable means, for example, a. centrifugal fan or air pump. The floor-coverings, while held in this position, are subjected to the action of a rotating beater which dislodges the dirt from the floor coverings and enables the current of air passing throughthe cleaner to carry the dust and dirt toa convenient collecting receptacle.

'Machines of this character are provided with a wide open mouth and it is desirable that this mouth be provided with brush guards to prevent the floor coverings from being drawn so far into the suction mouth as to prevent efficient beating action and alsoto prevent the entrance of unduly large pieces of refuse which might foul the mechanism.

An object of my invention is the provision of brush guard for suction cleaners of the type described which will not be easily'distorted or displaced.

A further object is the provision of brush guard which will allow the passage and entrance into the suction mouth of elongated articles such as matches, hair-pins, toothpicks etc, and at the same time have no free ends upon which objects such as fringes and edges of rugs might catch.

Vith these and other objects in View my invention consists of a novel construction and arrangement of parts hereinafter de scribed more particularly and pointed out in the claims. Practical forms in which my invention may be embodied are shown in the drawings, in which like reference characters CLEAIQEER.

1, 1923 Serial No.- 616,384.

refer to like parts throughout the views thereof.

Figure 1 is a side elevation of a suction.

cleaner with the forward parts broken away to show the brush guard;

Figure 2 is a fragmentary sectional viewthrough the suction hood illustrating a ing 10 to which ispivotailly secured a handle 11'. In this casting 10' is formed a fan ber 12 having. an outlet 13 adapted to receive a dust-collecting bag 14. Extending forwardly from the main casing is a suction hood 15 provided with a downwardly facing suction mouth 16 having a; frontlip- 17 and a rear lip 18. Mounted in the suction hood 15 on. suitable bearings is a rotating beater 19, provided 1n this case, with bristles 19.

In order that the floor covering 20 which isbeing cleaned will not be drawn too far' into the suction mouth, I have provided brush guards which in the modification illus trated by Fig. 1 consist of a plurality of resilient members 21 preferably made of steel wire, each of which has one end firmly secure-d to a bar 22 which in turn is secured to the inside wall of the front lip 17. Eachbrush guard is then extended rearwardly to a point somewhat to the rear of the axisof the rotary heater and is then curved on a radius substantially the same as that of the beater through an arc of degrees and then extends upwardly where each free end is firmly secured to a bar 23 which in turn is secured by any suitable means to the top of the suction hood 15.

It is to be noted that the brush guards 21 do not extend rearwardly enough to touch the rear lip 18 of the suction mouth. This arrangement allows sufiicient clearance between the brush guard and the rear lip of the suction mouth to provide a passageway for any elongated articles that might othervise bridge the space between two or more adjacent brush guards while at the same time the brush guards have no free ends upon which free ends of an object being cleaned, for example, rug fringes, might catch.

In Fig. 2 I have illustrated a modification wherein the brush guards 24 are attached at one end to the bar 22 and then extend rearwardly for a distance approximately half the width of the suction mouth and are then curved in a circular shape with a radius approximating that of the rotating heaters. The free end of each brush guard is then secured by any suitable means, for example by welding, to the horizontal portion of the brush guard, as at 25.

In Fig. 3 I have illustrated another modification in which the brush guards 26 are secured at one end to the bar 22 and then extend rearwardly in substantially the plane of the suction mouth to a point near, but not in contact with the rear lip 18 of the suction mouth. V

The brushguards at this point are given a 90 degree turn and extend vertically upward to a point level with the top of the rotating beater. At this point they are given a 90 degree bend forwardly, and then given another 90 degree bend downwardly, and then firmly secured in the bar 22.

It is to be particularly noticed that in each modification a space is left between the brushguards and the rear suction lip which allows the passageway of elongated objects andthat there are no free ends upon which fringe or other parts of floor coverings might catch.

Itis also to be noted that where the rotating beater is formed of bunches of bristles, as is here shown for the sake of illustration, the brush guards are constantly swept and kept clean by the action of the rotating element.

I claim '1. In combination with av suction cleaner provided with a casing having an inlet iouth having front and rear edges an agitating element rotatably mounted in said mouth, a series of guards extending partially across said inlet month, each of: said revises guards being secured at each end to said casing and passing near to but out of con tact with one of the edges of said inlet mouth.

2. A suction cleaner comprising a casing having an inlet mouth provided with front and rear lips, an agitator rotatably mounted in said casing above said mouth, a series of guards extending partially across said inlet mouth, each or said guards being secured at one end to the front lip of the inlet mouth and at the other end to a wall of the casing. i

8. In combination with a suction cleaner, having a brush chamber provided with an inlet mouth, a series of guards secured at one end to the brush housing near the inlet mouth and at the other end to the top wall ot'the brush housing. I i

4. In a. suction sweeper having a downwardly facing open inlet mouth having front, rear and side edges, a revoluble beater member mounted therein, guard members secured at the front edge of the inlet mouth and extending toward the rearward edge but not in contact therewith, the rear end of each 01" the guard members extending upwardly into the inlet mouth physically secured therein independently of the remainder of the member.

5. The combination of a suction sweeper provided with a suction inlet having front,

rear and side edges and having a revolubly mounted brush therein, brush guards secured adgacent the front edge of the inlet and extending rearwardly thereof but out of contact with the rear edge thereof, the rear end of each of said brush guards being physically secured within said suction inlet independently of the remainder of the guard.

Signed at Chicago, in the county of Cook, in the State of Illinois, this 26th day of January A. D. 1923.

- HARRY S. DEMAREE. 

